The development of neutralizing antibodies in a patient receiving subcutaneous recombinant and natural interleukin-2.

Kirchner, H; Körfer, A; Evers, P; Szamel, M M; Knüver-Hopf, J; Mohr, H; Franks, C R; Pohl, U et al. · Cancer · 1991

case_report · Level V

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Abstract

Systemic administration of interleukin-2 (IL-2) in humans may induce antibodies specific to IL-2. The case is reported of a patient with metastatic rectal carcinoma who was treated with long-term subcutaneous IL-2 and a combination of subcutaneous IL-2 and interferon-alpha 2b (IFN-alpha 2b). This patient developed nonneutralizing and neutralizing anti-IL-2 antibodies recognizing both the recombinant and natural cytokine. Detectable serum levels of neutralizing antibodies were accompanied by the inhibition of immune responsiveness to systemic IL-2 in vivo.

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